Suppose that a group of 150 students have joined at least one of the chat rooms: one on auto racing, one on bicycling, and one for college students. For simplicity, we call these rooms A, B, and C respectively. In addition, 90 students joined room A; 50 students joined room B; 70 students joined room C; 15 students joined rooms A and C; 12 students joined rooms B and C; 10 students joined all Ihree rooms. How many students joined both chat rooms A and B?

Suppose that a group of 150 students have joined at least one of the chat rooms: one on auto racing, one on bicycling, and one for college students. For simplicity, we call these rooms A, B, and C respectively. In addition, 90 students joined room A; 50 students joined room B; 70 students joined room C; 15 students joined rooms A and C; 12 students joined rooms B and C; 10 students joined all Ihree rooms. How many students joined both chat rooms A and B?

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter14: Counting And Probability

Section14.CT: Chapter Test

Problem 2CT: A hospital cafeteria offers a fixed-price lunch consisting of a main course, a dessert, and a drink....

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